The Texas Speed 4AN Nylon Braided PTFE Hose is a 3 foot length of flexible 4AN hose with a PTFE inner liner and a nylon braid outer cover. The PTFE liner is the key feature: it does not allow fuel vapor to permeate through the hose wall, which is why PTFE-lined hose is the usual choice for gasoline and E85 fuel systems where a rubber-core hose would eventually let fuel smell escape. In this size, -4AN is a small-diameter size commonly used for gauge feeds, fuel pressure reference lines, boost reference lines and small oil or coolant lines.
Texas Speed rates its PTFE flex hose for fuel, water, oil, transmission fluid and air, and builds it to handle demanding conditions with protection against abrasion and corrosion across all weather conditions. The nylon braided cover protects the liner from chafing where the hose crosses brackets or frame rails. This listing is for a single 3 foot length; Texas Speed offers the same hose in other lengths and diameters, and PTFE-lined hose should be assembled with hose ends made for PTFE hose, such as the Texas Speed PTFE swivel hose ends sold in the same AN size.
Specifications
- Hose type: Flexible PTFE-lined hose with nylon braided cover
- Hose size: -4AN
- Length: 3 ft
- Liner: PTFE, eliminates fuel vapor permeation
- Outer cover: Nylon braid, abrasion and corrosion resistant
- Compatible fluids: Fuel, water, oil, transmission fluid and air
- Weather rating: Suitable for all weather conditions per Texas Speed
- Part number: TSP-4006 (Texas Speed 25-4006, mfr. SL110-04-3FT)
FAQ
What is the Texas Speed 4AN nylon braided PTFE hose used for?
This 3 foot length of 4AN PTFE-lined hose is rated by Texas Speed for fuel, water, oil, transmission fluid and air. In the 4AN size it is commonly used for gauge feeds, fuel pressure reference lines, boost reference lines and small oil or coolant lines.
Is this 4AN PTFE hose safe for E85 and gasoline?
Yes. The Texas Speed 4AN nylon braided hose uses a PTFE liner, which Texas Speed states eliminates fuel vapor permeation. PTFE is the lining normally chosen for gasoline and E85 fuel lines because it does not let fuel vapor pass through the hose wall.
What hose ends work with Texas Speed 4AN PTFE hose?
PTFE-lined hose requires hose ends designed for PTFE hose, which use an internal ferrule or olive to seal on the liner. Texas Speed offers 4AN straight and angled swivel PTFE hose ends in black 6061 aluminum that are made to work with its PTFE braided hose. Standard rubber-hose AN ends should not be used.
How long is this hose and does Texas Speed sell other lengths?
This listing is a single 3 foot length of 4AN nylon braided PTFE hose, Texas Speed part 25-4006. Texas Speed sells the same hose in several other lengths and in other AN diameters, so choose the length that covers the run with some slack for routing.
Is the Texas Speed 4AN PTFE hose a universal part?
Yes. It is not vehicle specific. The 4AN nylon braided PTFE hose can be cut to length and used on any fuel, oil, coolant, transmission cooler or air line that uses -4AN PTFE hose ends.
What is the difference between the nylon braided and stainless steel braided Texas Speed PTFE hose?
Both versions use the same PTFE liner and are rated for the same fluids. The difference is the outer cover. Texas Speed offers its PTFE flex hose with either a nylon braided cover or a stainless steel braided cover, both intended to protect the hose from abrasion and corrosion. This listing is the nylon braided version in 4AN, 3 ft.
